Integral type anisotropic multipolar ferrite bead and preparation method thereof
A ferrite magnetic ring, anisotropic technology, applied in the manufacture of inductors/transformers/magnets, magnets, magnetic objects, etc., can solve the failure of bonded magnetic tiles, increased cogging effect of motors, and shedding of magnetic tile parts, etc. question
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Embodiment 1
[0024] Main component: Fe 2 o 3 : SrO=1: 5.5; Based on the sum of the quality of the main components, the kaolin addition: 0.35%; the calcium carbonate addition: 0.60%, and 1.0% of the nano-inorganic flux is batched, and the obtained mixture is ball milled, pre- Sintering, secondary formulation, secondary ball milling, pre-magnetization, dry pressing, sintering, grinding, inspection and other steps. Among them, the nano-inorganic flux is Bi with a mass ratio of 1:1 2 o 3 Powder and Bi 2 o 3 , and the DL602 silane coupling agent with a mass content of 3% relative to the inorganic flux is obtained by high-energy ball milling, the ball milling speed is 400 rpm, and the ball milling time is 10 hours.
[0025] In the above secondary ball milling process, 1.0 wt% camphor was added as a binder, and 0.5 wt% calcium stearate was added as a lubricant. Adhesive camphor is heated at 150°C and is in a molten state.
[0026] The dry pressing process is as follows: the ferrite magneti...
Embodiment 2
[0029] Main component: Fe 2 o 3 : SrO=1: 5.7; Based on the sum of the quality of the main components, kaolin add-on: 0.50%; Calcium carbonate add-on: 0.40%, nano inorganic flux 5.0% is batched, the mixture obtained is through ball milling, pre- Sintering, secondary formulation, secondary ball milling, pre-magnetization, dry pressing, sintering, grinding, inspection and other steps. Among them, the nano-modified flux is Bi 2 o 3 and WO 3 After the powder is mixed in a mass ratio of 2:1, it is obtained by adding γ-aminopropyltriethoxysilane accounting for 1% of the mass of the mixed powder and performing high-energy ball milling. The ball milling speed is 300 rpm and the ball milling time is 12 hours.
[0030] During the above secondary ball milling process, 0.8 wt% camphor was added as a binder, and 0.7 wt% calcium stearate was added as a lubricant. Adhesive camphor is heated at 180°C and is in a molten state.
[0031] The dry pressing process is as follows: the ferrite m...
Embodiment 3
[0034] Main component: Fe 2 o 3 : SrO=1: 5.6; Taking the mass sum of main components as a benchmark, kaolin add-on: 0.46%, calcium carbonate add-on: 0.53%, nanometer inorganic flux 5.0% carries out batching, the mixture that will be prepared is through ball milling, pre- Sintering, secondary formulation, secondary ball milling, pre-magnetization, dry pressing, sintering, grinding, inspection and other steps. Among them, the nano-modified flux is CuO, Bi 2 o 3 、WO 3After the powder is mixed in a mass ratio of 1:1:1, it is obtained by adding 3-aminopropyltriethoxysilane accounting for 4% of the mass of the mixed powder and performing high-energy ball milling. The ball milling speed is 300 rpm and the ball milling time is 12 hours.
[0035] In the above secondary ball milling process, 1.2 wt% camphor was added as a binder, and 0.3 wt% calcium stearate was added as a lubricant. Adhesive camphor is heated at 180°C and is in a molten state.
[0036] The dry pressing process is...
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